Flame-spreader for burners.



C. W. DAVIS L V. S. JOHNSON.

FLAME SPREADER FOR BURNERS.

APPLlcAUoN mw Aucas, |914. 1,273,587. Patented July 23,1918.,

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C. W. DAVIS-3L V'.S.10HNSON.

FLAME SPREADER FOR BuRNEHs.

` APPLICATION FILED AUG-28.1914.. 1 ,273,587. Patented July 23, 1918.

2 SHEETS-SHEET 2.

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CORTLAND W. DAVIS AND VICTOR S. JOHNSON, OF CHICAGO, ILLINOIS, ASSIGNORS TO THE MANTLE LAMP COMPANY OF AMERICA, OF CHICAGO, ILLINOIS, A CORPORATION 0F ILLINOIS.

FLAME-SPREADER FOR- BURNERS.

Specification of Letters Patent.

make and use the same.

This invention is an improvement in hydro-carbon burners and pertains more particularly fto the flame spreader of such burners.

In hydro-carbon burners, and especially those employed in connection with incani descent mantle lamps, it is highly important that the heat of the flame beI not conducted to the wick carrying and guiding devices, in order to reduce as much as possible the heating of the burner structure below the flame. The heating of the wick tubes is recognized as one of the causes of increased vaporization or creeping up of the flame during the operation of the lamp, thereby resulting in many ofthe defects noted in' burners of this character.

This invention has for its object to reduce the transmission Of heat from the flame spreader to the wick tube. In burners of this character, itis not infrequent to support the fiame spreader from one of the wick tubes, and especially the inner wick tube in central draft burners.

I Other objects of the invention will become apparent 'from the following detail description.

In carrying out the invention, one method is to construct the flame spreader of a plurality of members, one of which is provided with the usual perforations to permit air from the central draft. tube to pass through the spreader to the fiame, and is herein referred to as the flame member. This member may be su orted' from another `member. mounted irectly upon the wick tube, and herein referred to as a tube member to distinguish the same from the flame member. The spreader may be char- -acterized in that, the tube member is maintained out of direct contact with the flame member by suitable heat dissipating or insulating means, whereby the heat. which may be transmitted to the flame member, and which would ordinarily 'be conducted thereby to other parts of the burner, is restricted from spreading directly to the tube member, by suitable insulating or heat dissipating means.

The invention consists further in the combination and arrangement of parts as will be hereinafter more particularly set. forth in the following description and the ap ended claims.

s example of practical embodiments of the invention, concrete forms thereof are illustrated in the accompanying drawings in which:

Figure 1 is a vertical sectional view through a spreader wherein the flame member is supported from the tube member by a perforated tubular supporting element. Fig. 2 is a vertical sectional view disclosing the flame member supported out of contact with the tube member by means of a perforated tubular support and insulating medium.

Fig. 3 is' another embodiment employing an insulatin medium.

Fig. 4 iscloses another embodiment wherein heat resisting material is retained between the supporting tube and the flame member. A f I Fig. 5 is another detail view'of means whereby insulating material may be retained to prevent the metallic contact between the flame member and the tube member of the structure.

Fig, 6 is another detail view of means to support a tubular supportin element, disclosing a perforated truncate cone car- Patented July 23, 1918. v

ried by the lower member of thespreader.

Fig. 7 is a detail view of means to support a flame section of a spreader.

Fig. 8 is a detail view, in section, of another embodiment of the flame spreader.

In maintaining the heated member of the spreader out. of contact with the tube maintain the may be of any preferred character, andmay be removably mounted upon the inner wick tube 2, if desired. The wick tube may have suitable means, such as a stop 3, to support the lower or tube member l. The tube member has a substantially cylindrical wall which is preferably contracted at the upper end, as at 4. At the base of the tube member there is shown a plurality of vanes 5, which may be in the form ofa narrow strip vof metal, and which may be perforated, if found desirable. These vanes 5 serve to support a tubular element 6y designed to flame member 7. of the spreader out of contact with the tube member 1 thereof. The tubular supporting element 6, inthis ligure, is preferably perforated for the greater portion of its length, and is provided with a shoulder 8 near the upper end thereof. Beyond this shoulder the tube is extendedl in order that its upper end 9 may pass through an opening in the flame member 7 and be crimped down upon the top of said flame member, as indicated at 10, to maintain the parts in their operative position. I

The flame member 7 is shown provided with a substantially flat upper portion 11, and inclined portion 12 which may have a row of perforations therein, and a depend- .ing flange 13, which is also provided with a series of perforations to leave but narrow bridges of metal. The depending flange 13 i is designed to be vis preferably extended downwardly in the direction of' the Wall of the tube member 1, but maintained out of contact with said tube member and also the inner wick tube. The contracted portion 4 of member l, however, ositioned within the flange 13 of the mem er 7 and to serve as a baffle to prevent the air from reaching the flame' at undesired points. It is preferred' that most of the airy from the inner wick tube shall be admitted into the flame, 'and not to the wick, and this contracted portion 4 is extended upwardly into the flame member 7 for a sufficient distance to'accomplish the desired results. It will be observed that heat from the ame 14 if conducted by the flange 13I to the top 11,' will be` gradually dissipated through the narrow bridges of metal constituting the perforated tubular supporting element 6 before it reaches the vanes 5, while the air` coming up through the central draft tube, to pass out through the perforations in the parts 12 and flange 13 of member 7, will have a cooling effect upon the tube member 1 and its contracted portion 4. It will be-observed, also, that the air from this central tube will be permitted to pass through the tubular supporting element 6 and out through its perforations. VThe cooling effect of the air supply, together with the construction set forth, will serve to greatly dissipate the heat created by the flame before it can reach the inner wick tube, thereby maintaining said tubel in a comparatively cool condition. In Fig. 2l a similar construction of the tube member 1, is` illustrated. The perforated tubular supporting element 6, however, is shownv provided at its upper end with a plug of insulating material 15, which has a reduced member tol the perforated supporting ele- A ment 6.

In Fig. 3 a somewhat similar structure is illustrated in which the perforated tubular supporting element 6 is provided with the shoulder 8, the head 9 and retaining portion 10, as in Fig. 1, to serve to secure between the portions 8 and 10 a suitable heat insulating medium indicated at 18. This insulating medium may be lava, magnesium, or any other desired material. In this construction the insulating medium 18 is shown provided with a peripheral channel 19 adapted to receive a portion 20 of the llame member 7, which portion 20 may be crimped or otherwise forced into the channel 19 to hold the parts in position, and maintain the member 7 out of contact with member 1.

In Fig. 4 the upper end of the preforated tubular supporting element 6 may be pro- 'vided with an lenlar ed flattened head 21.

The flame member however, is shown provided with a hollow button 22, the walls 23 of which are straight and at substantially `right angles to the basef24, before assembling of theparts. This button may be secured to the llame. member 7 by any suitable` Imeans, such as hard solder, riveting or the are crimped down to'secure the packing i between said walls 23 and the head 21 of the supporting element 6. j

In Fig. 5., there is disclosed another form of the button 22, wherein the base 24 of the button is passed through an aperture in the top 11 of the flame 7 and is crimped thereon. The walls 23 serve in this embodiment to hold the insulating material, such as asbestos, in position With relation to the supporting element 6.

In Fig. 6, the vanes 5 are omitted, and in lieu thereof the perforated tubular supporting element 6 is shown mounted upon a perforated truncated cone 26 which is suitably positioned within the tube member 1 of the spreader.

In Fig. 7, another embodiment of the flame spreader is illustrated, wherein the tube section is eliminated. In the construction of F ig.`7, the flame section 7 may be similar to that shown in Fig. 1 having the top section 10 and the depending wall or section 13. This depending section 13 is provided with rows of perforations or apertures to permit air from the central draft tube to be admitted to the flame. This flame section 7 may be supported at a point above the rows of apertures by suitable means, and preferably by the perforated tubular supporting element 6, shown in Fig. 1. This supporting element 6 may be maintained in position upon a post 27 or any other suitable device, supported in a suitable manner, for example by the fins 28, from the inner wick tube.

In Fig. 8, the spreader is shown having the top section .10 and the perforated depending section 13, but this section 13 may be contracted at its lower portion, as at 29. This spreader may be supported by suitable heat resisting means, such as a collar of asbestos, lava or the like, indicated at 30,

which, may be retained in position between the spreader' and inner wick tube, in any suitable manner.

It is obvious that various other changes and modifications may be made in the form and proportion of the parts, but the right l is reserved to make such changes in the device as will fall within the scope of the appended claims.

Having thus described our invention, what we claim as new and desire to secure by Letters Patent is:

1. A flame spreader unit, comprising an upper flame member, a lower supporting member for sustaining said flame member, and heat dissipating means in yproximity to the flame member for limiting conduction of heat to the supporting member.

2. A flame spreader unit, comprising an upper flame member, a lower tubular supporting member for sustaining said flame member, and a tubular perforated member in proximity to the flame member for limiting conduction of heat from the flame member to the tubular supporting member.

3. A flame spreader unit, comprising an upper flameV member, a lower supporting member, and means for supporting the flame member from said supporting member, said lower supporting member having an extended upper edgel arranged to restrict the flow of air to a part of the flame..

4. A flame spreader unit, comprising an -upper flame member', a lower supporting member, non-heat conducting means adjacent the flame member, for restrainingthe -passage of heat from the flame member, and heat dissipating means for further limiting the passage of heat through the spreader.

5. A flame spreader unit, comprising an upper perforated flame member, alower tubular supporting member, and a tubular perforated member adjacent the flame member and secured into the flame member at its upper end, and adapted to dissipate hea-t received from the flame member.

6. A flame spreader unit, comprising a perforated flame member, a tubular supporting member, heat dissipating means adjacent the flame member, and a spacing device for said supporting member and said heat dissipating means.

7. A flame spreader unit, comprising an upper flame member, a lower supporting member, a heat dissipator adjacent the flame spreader, and a perforated spacing device disposed between the supporting member and the heat dissipator.

8. In a flame spreader, for hydro-carbon burners, comprising a lower tube member and an upper flame member, said lower tube member having a contracted upper end and a spacing device near its lower end, a supporting element carried by said spacing device, and means carried by said supporting element to maintain said upper flame member out of contact with said lower tube member, said upper flame member having a depending perforated Hange adapted to be positioned concentric with said contracted end of the tube member.

9. A flame spreader comprising a plurality of members, a lower tube member of which is adapted' to be mounted concentrlc with a wick tube of a burner and is provided with a contracted upper portion, and an upper flame member supported out of contact with the lower tube member and having a depending perforated flange positioned concentric with the contracted portion of the tube member. Y

10. A flame spreader for hydrocarbon burners comprising a lower tube member and an upper flame member, the lower tube member being mounted concentric with a wick tube of a burner, said tube member having a contracted upper portion, a perforated spacing devicel mounted from the lower tube member, a supporting element mounted centrally within the tube member by the spacing device, said supporting element extending above the, contracted portion of the tube member to support the upper flame member of the spreader out of contact with the tube member, said flame member having' a depending perforated flange adapted to be positioned concentrically with, and slightly spaced away from, the contracted end of the tube member.

11. A flame spreader unit, comprising an a V upper iame member, heat dissipating means adJacentsaid flame member, and a supporting member, said heat dissipating means having perforations adapted to admit air to the interior of the flame member.

12. A flame spreader unit, comprising an upper flame member having a perforated depending section, a heat insulator, and a support, the heat insulator being disposed between the top of the fl me member and the support.

13. A flame spreader unit, comprising an upper flame member, v.a lower supporting member for sustaining saidflame member, and heat resisting material secured to and adjacent said .flame member for limiting conduction of heat from said flame member to said supporting member.

14. A flame spreader comprising a plurality of members including an upper perforated thimble member, and heat dissipating means contiguous to the thimble member to support said upper member from the remaining part of the spreader.

15. A flame spreader including a plurality of' sections, the top section being substan-v -l tially in the form of a thimble provided with a foraminous side wall, said section being supported by a tubular perforated-'supporting element.

l16. In a burner, thimble type having a top section and a perforated depending section, and a perforated tubular' element carried by the wick tube to support said flame spreader from its top section.

17. A flame spreader unit., comprising an upper flame member having a depending section, a lower sup-portingmember, said depending section being substantially in alinev ment with the wall of the supporting mem- 30 a flame spreader of the 4 ber, and means to sustain the flame member CORTLAND W. DAVS. VICTOR S. JOHNSON.

l llVitnesses:

B. S. PREsBA,- J. S. BAKER. 

